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Simple Dynamic Subcarrier Allocation With CQI Feedback Reduction for OFDMA Systems

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3 Author(s)
Choongchae Woo ; Sch. of Electr. Eng., Yonsei Univ., Seoul ; Eunsung Oh ; Daesik Hong

The focus of this paper is a proposal for a computationally efficient dynamic subcarrier allocation (DSA) algorithm for orthogonal frequency-division multiple access (OFDMA) systems. The proposed DSA algorithm considerably reduces the computational complexity and the amount of channel quality information (CQI) compared to amplitude-craving greedy (ACG) algorithms, which use full CQI. At the same time, the performance of the proposed algorithm closely approaches that achieved by ACG algorithms. Moreover, the authors present a new bandwidth-assignment algorithm produced by modifying bandwidth assignment based on the signal-to-noise ratio (BABS). This modified BABS algorithm enables the proposed DSA algorithm to produce a strong outage performance gain over the conventional scheme.

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Vehicular Technology, IEEE Transactions on  (Volume:57 ,  Issue: 5 )